It's okay to be appalled, it's normal. I'm appalled too. But because of our shitty, two party system, you are basically made to choose between the lesser of two evils in swing states. Choosing to not vote, or to vote for another party risks this exact outcome. While your vote in your state may not have had a direct impact (I'm willing to relent on that for now), what you say online (Lemmy or otherwise) or in person can convince someone in a swing state to also be apathetic, and that's what hurts. It only has to affect one other person in a swing state, and then they'll also spread their apathy to other voters in the state. It's not a huge logical leap to consider.
When I say that you're apathetic, I'm only talking about your voting habits. I know nothing else about you or what you do. I'm also not sure how trying to show how this behavior could result in our current situation is "making it worse". I'm not trying to be insulting here, but if this apathy continues for the midterms (if they actually happen), it could very well convince some people to also not give a shit. I don't want others in states where it really does matter to see your comments and think it's all good to become entirely apathetic.
What really got to me was your comment about not caring about getting sent to the camps. Your relatives experiencing pain and trauma is one thing, but to experience concentration camps yourself is another thing entirely. You saying you don't care about that could also be seen as you saying that you don't care about the rest of the community being sent there, as well.